The link to the 5-4 decision written by Justice Kennedy can be foundHere.

"The right of voting for representatives is the primary right by which other rights are protected. To take away this right is to reduce a man to slavery, for slavery consists in being subject to the will of another, and he that has not a vote in the election of representatives is in this case." Thomas Paine: Dissertation on First Principles of Government (July 1795)

"DOMA’s principal effect is to identify and make unequal a subset ofstate-sanctioned marriages. It contrives to deprive some couples married under the laws of their State, but not others, of both rights and responsibilities, creating two contradictory marriage regimeswithin the same State. It also forces same-sex couples to live as married for the purpose of state law but unmarried for the purpose offederal law, thus diminishing the stability and predictability of basicpersonal relations the State has found it proper to acknowledge and protect."

Justice Scalia is among the dissenters to the opinion and he is reading his dissent from the bench as I write. (Much as Justice Ginsburg read her dissent from the bench in yesterday's Voting Rights Act case.)

What will be a huge issue is that this decision does not apply to states that do NOT allow same sex marriage. So, for example, Texas, which does not honor same sex marriage, does NOT have to grant same sex married people equal marriage rights under Texas law, even though the same couples now have them under federal law.

And... prop 8 is now defunct in California because the court sent it backdiown...lcomplicated legalese reasoning... but the end result is that prop 8 is gone, so same sex marriage is legal in California.

By way of clarification, the Court did not strike down all of DOMA. It only struck down the portion(s) that limit marriage to hetero couples. So, basically - applying Amy Howe's analysis at SCOTUSblog - the law remains intact except that legally married same-sex couples must now be treated the same under federal law as legally married hetero couples.